File(s) under permanent embargo
Sensitive, high-strain, high-rate bodily motion sensors based on graphene-rubber composites
journal contribution
posted on 2023-06-09, 11:42 authored by Conor S Boland, Umar Khan, Claudia Backes, Arlene O'Neill, Joe McCauley, Shane Duane, Ravi Shanker, Izabela Jurewicz, Alan DaltonAlan Dalton, Jonathan N ColemanMonitoring of human bodily motion requires wearable sensors that can detect position, velocity and acceleration. They should be cheap, lightweight, mechanically compliant and display reasonable sensitivity at high strains and strain rates. No reported material has simultaneously demonstrated all the above requirements. Here we describe a simple method to infuse liquid-exfoliated graphene into natural rubber to create conducting composites. These materials are excellent strain sensors displaying 104-fold increases in resistance and working at strains exceeding 800%. The sensitivity is reasonably high, with gauge factors of up to 35 observed. More importantly, these sensors can effectively track dynamic strain, working well at vibration frequencies of at least 160 Hz. At 60 Hz, we could monitor strains of at least 6% at strain rates exceeding 6000%/s. We have used these composites as bodily motion sensors, effectively monitoring joint and muscle motion as well and breathing and pulse.
History
Publication status
- Published
File Version
- Published version
Journal
ACS NanoISSN
1936-0851Publisher
American Chemical SocietyExternal DOI
Issue
9Volume
8Page range
8819-8830Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Materials Physics Group Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2018-01-19First Compliant Deposit (FCD) Date
2018-01-19Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC